Scalable current leaderboard using delta-encoded updates

Abstract

Systems and techniques are provided for providing a scalable current leaderboard. Entries may be received. The entries may include an identifier and a score. The entries may be sorted according to a sorting criterion to obtain a leaderboard. The entries may be ranked with a rank according to the position of the entry on the leaderboard. The entry may include the rank. The leaderboard may be divided into buckets. Each bucket may include consecutive entries from the leaderboard. One of the entries may be included at the end of a first buckets and at the beginning of a second buckets. The buckets may be ordered sequentially. The bucket may be updated with score versions to produce an updated bucket, where the score versions may include new versions and old versions.

Description

BACKGROUND[0001]A leaderboard may be a list of ordered values and identifiers which may represent, for example, scores achieved by users of a game. For example, a leaderboard may display entries including the names or other identifiers of users, their scores, and the ranking of their scores among the scores achieved by other users. Entries on the leaderboard may be ordered based on the scores, for example, with the scores and users sorted from highest score to lowest score. If the leaderboard is public and displays scores for a large number of users, for example, the users of a game available on mobile devices, the number of entries on the leaderboard may grow very large, for example, into the millions.[0002]The leaderboard, and its data including the user names and scores, may be stored at some central location where users can access it. When viewing a leaderboard, a user's device may not have enough memory to hold or screen space to display the entire leaderboard, and the bandwidt...

AI Technical Summary

Benefits of technology

The patent describes a system for creating and accessing a leaderboard of entries. The entries are ranked based on their scores and can be divided into buckets. The system allows users to request specific parts of the leaderboard and update the buckets with new entries. The technical effects of this system include improved access to leaderboards and the ability to rank entries based on their scores.

Problems solved by technology

When viewing a leaderboard, a user's device may not have enough memory to hold or screen space to display the entire leaderboard, and the bandwidth needed to transfer a leaderboard with millions of entries to a user may be excessive.

However, if the user wishes to view another portion of the leaderboard, for example, by scrolling down past the already displayed entries, the user's device may need to receive another portion of the leaderboard and hold that portion in memory along with the first, resulting in additional communication overhead and memory usage.

The first portion of the leaderboard may also be discarded when new portion is received, but this may lead to a disjointed experience, as the entries displayed on the screen may change completely when a new portion is received, rather than changing one at a time as they would during normal scrolling.

This may be computationally expensive when the leaderboard has millions of entries, resulting in millions of scores that need sorting.

To avoid the storage and computational costs of large leaderboards, some leaderboards may be limited in size, due to either not having a large number of scores submitted or being restricted to a specific locality or time period.

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